Which company owns MAC address prefix 58:38:79?

MAC address prefix 58:38:79 is registered to RICOH COMPANY, LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:38:79 has a network interface built by RICOH COMPANY, LTD..

What is the OUI 58:38:79?

58:38:79 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to RICOH COMPANY, LTD.. It covers every address from 58:38:79:00:00:00 to 58:38:79:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-38-79.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 58:38:79:00:00:00 that is 58:38:79 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is RICOH COMPANY, LTD. located?

RICOH COMPANY, LTD. is listed at 1005, Shimo-ogino Atsugi-City Kanagawa-Pref. JP 243-0298 in the IEEE OUI registry entry for 58:38:79. This is the address the organization registered with the IEEE, which may differ from its current operating address.

RICOH COMPANY, LTD.

MAC address prefix 58:38:79 is registered to RICOH COMPANY, LTD. in the IEEE OUI registry. Any device whose MAC address begins with 58:38:79 has a network interface built by RICOH COMPANY, LTD.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 58:38:79:00:00:00 to 58:38:79:FF:FF:FF.

OUI prefix: 58:38:79
Hyphen form: 58-38-79
MAC range: 58:38:79:00:00:00 – 58:38:79:FF:FF:FF
Addresses in block: 16,777,216
Organization: RICOH COMPANY, LTD.
Address: 1005, Shimo-ogino Atsugi-City Kanagawa-Pref. JP 243-0298
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2017-09-08Assigned to "RICOH COMPANY, LTD."
archived source →
2026-07-17Assigned to "RICOH COMPANY, LTD."

Nearby in the registry

The prefixes assigned immediately before and after 58:38:79:

FAQ

Which company owns MAC address prefix 58:38:79?: MAC address prefix 58:38:79 is registered to RICOH COMPANY, LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:38:79 has a network interface built by RICOH COMPANY, LTD..
What is the OUI 58:38:79?: 58:38:79 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to RICOH COMPANY, LTD.. It covers every address from 58:38:79:00:00:00 to 58:38:79:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-38-79.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 58:38:79:00:00:00 that is 58:38:79 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is RICOH COMPANY, LTD. located?: RICOH COMPANY, LTD. is listed at 1005, Shimo-ogino Atsugi-City Kanagawa-Pref. JP 243-0298 in the IEEE OUI registry entry for 58:38:79. This is the address the organization registered with the IEEE, which may differ from its current operating address.